9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/* $Id$ */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/** @file
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * IPRT - Spinlocks, Ring-0 Driver, Haiku.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*
c0b6af690ad705bddfa87c643b89770a7a0aaf5avboxsync * Copyright (C) 2012-2014 Oracle Corporation
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * available from http://www.virtualbox.org. This file is free software;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * you can redistribute it and/or modify it under the terms of the GNU
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * General Public License (GPL) as published by the Free Software
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * The contents of this file may alternatively be used under the terms
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * of the Common Development and Distribution License Version 1.0
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * VirtualBox OSE distribution, in which case the provisions of the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * CDDL are applicable instead of those of the GPL.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * You may elect to license modified versions of this file under the
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * terms and conditions of either the GPL or the CDDL or both.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Header Files *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include "the-haiku-kernel.h"
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include "internal/iprt.h"
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/spinlock.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/assert.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/asm.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
2b3dc93fedb4e72ac5b3cbaa89a9fc2f559be550vboxsync#include <iprt/asm-amd64-x86.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#endif
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/err.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/mem.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include <iprt/thread.h>
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync#include "internal/magics.h"
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/*******************************************************************************
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync* Structures and Typedefs *
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync*******************************************************************************/
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync/**
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Wrapper for the KSPIN_LOCK type.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsynctypedef struct RTSPINLOCKINTERNAL
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Spinlock magic value (RTSPINLOCK_MAGIC). */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync uint32_t volatile u32Magic;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Spinlock creation flags */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync uint32_t fFlags;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** Saved interrupt CPU status. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync cpu_status volatile fIntSaved;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /** The Haiku spinlock structure. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync spinlock hSpinLock;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync} RTSPINLOCKINTERNAL, *PRTSPINLOCKINTERNAL;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSpinlockCreate(PRTSPINLOCK pSpinlock, uint32_t fFlags, const char *pszName)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RT_ASSERT_PREEMPTIBLE();
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync NOREF(pszName);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /*
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Allocate.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertCompile(sizeof(RTSPINLOCKINTERNAL) > sizeof(void *));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)RTMemAllocZ(sizeof(*pSpinlockInt));
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (RT_UNLIKELY(!pSpinlockInt))
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VERR_NO_MEMORY;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /*
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Initialize & return.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pSpinlockInt->u32Magic = RTSPINLOCK_MAGIC;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pSpinlockInt->fFlags = fFlags;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pSpinlockInt->fIntSaved = 0;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync B_INITIALIZE_SPINLOCK(&pSpinlockInt->hSpinLock);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync *pSpinlock = pSpinlockInt;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(int) RTSpinlockDestroy(RTSPINLOCK Spinlock)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /*
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Validate input.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync if (RT_UNLIKELY(!pSpinlockInt))
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VERR_INVALID_PARAMETER;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertMsgReturn(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC,
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ("Invalid spinlock %p magic=%#x\n", pSpinlockInt, pSpinlockInt->u32Magic),
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync VERR_INVALID_PARAMETER);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /*
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync * Make the lock invalid and release the memory.
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync ASMAtomicIncU32(&pSpinlockInt->u32Magic);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync B_INITIALIZE_SPINLOCK(&pSpinlockInt->hSpinLock);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync RTMemFree(pSpinlockInt);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync return VINF_SUCCESS;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(void) RTSpinlockAcquire(RTSPINLOCK Spinlock)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtr(pSpinlockInt);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync Assert(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync /* Haiku cannot take spinlocks without disabling interrupts. Ignore our spinlock creation flags. */
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync pSpinlockInt->fIntSaved = disable_interrupts();
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync acquire_spinlock(&pSpinlockInt->hSpinLock);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsyncRTDECL(void) RTSpinlockRelease(RTSPINLOCK Spinlock)
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync{
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync PRTSPINLOCKINTERNAL pSpinlockInt = (PRTSPINLOCKINTERNAL)Spinlock;
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync AssertPtr(pSpinlockInt);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync Assert(pSpinlockInt->u32Magic == RTSPINLOCK_MAGIC);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync release_spinlock(&pSpinlockInt->hSpinLock);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync restore_interrupts(pSpinlockInt->fIntSaved);
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync}
9fc464631dc4a68fbb5eb6419d61fbe91b6b16bdvboxsync